Car stumbles and nearly dies on warm start

[arabeclipse]

For about a week now my car has been giving me a hard time on warm starts. On a cold start, the car starts up fine and I always give it a few minutes to warm up, and then drive it delicately til it's fully warmed up. I searched a bunch of forums for this but most of them were for the 420a's. I did find one that sounded like my issue but whatever was said in there didn't help me.

NOTE:

- I have a CEL for P1400 Manifold Differential blah blah blah..
- Not a SINGLE boost leak. I tested it so many times.
- New TPS but that was for a different issue
- Car USUALLY idles fine, but idles as low as 600 sometimes
- My car came with some BBK TB which was garbage. I picked out OE TB at a junkyard and it's perfect, but I don't know if that could be the cause of this.

I have no idea what could cause this. My narrowband (don't beat me up) says I'm running lean but I do not believe that in any way.

Here's a video: Eclipse GST warm start stumble - YouTube

 

[Kod]

Im gonna say possibly a bad maf or map, check o2 readings too unless you plugged them.

 

[arabeclipse]

Im gonna say possibly a bad maf or map, check o2 readings too unless you plugged them.

I'm running a gm maf though. And I'll do that.

 

[Kod]

Make sure the conversion is good if its recent, but that seems like a bad reading on fuel mixture after warm / hot. I had the problem of cold start up which turned out my downstream was shot and not reading, fresh cold start fine but kinda cold and not completely stone cold it would stall at times.

 

[arabeclipse]

Make sure the conversion is good if its recent, but that seems like a bad reading on fuel mixture after warm / hot. I had the problem of cold start up which turned out my downstream was shot and not reading, fresh cold start fine but kinda cold and not completely stone cold it would stall at times.

That makes sense because my narrowband is way more outta whack than it used to be. But, it's not connected to that. I still have the downstream when I switch to a full turboback. I'll look anyway.